Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A51-56149 found under Pin Special by Selex Es Ltd. The National Stock Number assigned to this part is 5315004532579, and the Federal Supply Class is 5315 Nails Machine Keys And Pins. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A51-56149.